login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A211904 T(n,k)=Number of triangular nXnXn arrays colored with integers 0 upwards introduced in row major order, with no element equal to any neighbor, and containing the value n(n+1)/2-k-1 6
0, 0, 1, 0, 1, 7, 0, 0, 14, 28, 0, 0, 15, 274, 76, 0, 0, 15, 1198, 2315, 166, 0, 0, 15, 2605, 36845, 11866, 316, 0, 0, 0, 3341, 336017, 481826, 44821, 547, 0, 0, 0, 3428, 1822850, 12353030, 3783481, 137859, 883, 0, 0, 0, 3429, 5987653, 210401656, 212518051 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,6

COMMENTS

Table starts

...0......0........0..........0............0............0...........0

...1......1........0..........0............0............0...........0

...7.....14.......15.........15...........15............0...........0

..28....274.....1198.......2605.........3341.........3428........3429

..76...2315....36845.....336017......1822850......5987653....12221947

.166..11866...481826...12353030....210401656...2442103346.19531771155

.316..44821..3783481..212518051...8415359939.242877057319

.547.137859.21275955.2254248571.174254333738

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..84

EXAMPLE

Some solutions for n=4 k=4

.....0........0........0........0........0........0........0........0

....1.2......1.2......1.2......1.2......1.2......1.2......1.2......1.2

...3.4.5....3.4.0....2.3.4....3.4.1....3.0.4....0.3.0....3.0.1....3.4.5

..0.6.0.7..5.0.6.2..1.4.5.2..5.0.5.4..0.1.5.3..3.4.1.5..4.5.3.2..5.6.1.2

CROSSREFS

Sequence in context: A154102 A240984 A235363 * A094898 A136115 A061846

Adjacent sequences:  A211901 A211902 A211903 * A211905 A211906 A211907

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin Apr 25 2012

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified July 15 14:28 EDT 2019. Contains 325031 sequences. (Running on oeis4.)